diff options
Diffstat (limited to 'src/devices/cpu/z80/z80.h')
-rw-r--r-- | src/devices/cpu/z80/z80.h | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/src/devices/cpu/z80/z80.h b/src/devices/cpu/z80/z80.h index ec111c3cd32..b40e697d81f 100644 --- a/src/devices/cpu/z80/z80.h +++ b/src/devices/cpu/z80/z80.h @@ -78,6 +78,8 @@ protected: void illegal_1(); void illegal_2(); u8 flags_szyxc(u16 value); + template <u8 Bit, bool State> void set_service_attention() { static_assert(Bit < 8, "out of range bit index"); if (State) m_service_attention |= (1 << Bit); else m_service_attention &= ~(1 << Bit); }; + template <u8 Bit> bool get_service_attention() { static_assert(Bit < 8, "out of range bit index"); return m_service_attention & (1 << Bit); }; void halt(); void leave_halt(); @@ -137,6 +139,16 @@ protected: devcb_write_line m_halt_cb; devcb_write_line m_busack_cb; + static constexpr u8 SA_BUSRQ = 0; + static constexpr u8 SA_BUSACK = 1; + static constexpr u8 SA_NMI_PENDING = 2; + static constexpr u8 SA_IRQ_ON = 3; + static constexpr u8 SA_HALT = 4; + static constexpr u8 SA_AFTER_EI = 5; + static constexpr u8 SA_AFTER_LDAIR = 6; + static constexpr u8 SA_NSC800_IRQ_ON = 7; + u8 m_service_attention; // bitmap for required handling in service step + PAIR16 m_prvpc; PAIR16 m_pc; PAIR16 m_sp; @@ -161,13 +173,10 @@ protected: u8 m_im; u8 m_i; u8 m_nmi_state; // nmi pin state - bool m_nmi_pending; // nmi pending u8 m_irq_state; // irq pin state int m_wait_state; // wait pin state int m_busrq_state; // bus request pin state u8 m_busack_state; // bus acknowledge pin state - bool m_after_ei; // are we in the EI shadow? - bool m_after_ldair; // same, but for LD A,I or LD A,R u16 m_ea; int m_icount; |